The Ultra Double Pumper is an all-aluminum carburetor built for hot street cars and race vehicles, weighing about 5 lbs less than a comparable zinc carburetor. It features black anodized billet aluminum metering blocks and base plate, 4-corner idle control, dual accelerator pumps, mechanical secondaries, a clear fuel level sight glass, and a factory pre-set electric choke. It's 100% wet-flow tested by Holley before shipping.
Specifications:
- CFM: 650
- Barrels: 4
- Model: 4150
- Secondaries: Mechanical
- Booster Design: Straight
- Fuel Inlet: Dual
- Choke: Electric
- Finish: Shiny (polished)
- Billet Color: Black
- Material: Aluminum
- Primary Main Jet: 63
- Secondary Main Jet: 73
- Primary Power Valve: 6.5
- Throttle Bore: 1.688"
- Vacuum Ports: 1 timed (spark), 2 full, 1 PCV
- Carburetor Use: Performance and Race
- Fuel Type: Gasoline
- Warranty: Manufacturer's Limited 90-Day Warranty
- Part Number: 0-76650BK
Uses the square-bore 4150 flange bolt pattern (5-3/16" x 5-5/8"), a direct fit for many Holley, Edelbrock, Carter AFB, and Autolite carburetors sharing the same pattern. A spreadbore-to-square-bore adapter is required for spreadbore-style intake manifolds.
FAQ
What CFM and flange pattern does the 0-76650BK use?
650 CFM on a square-bore 4150 flange, 5-3/16" x 5-5/8" bolt pattern.
What vehicles is this carburetor best suited for?
Lightweight vehicles with a manual transmission, or automatics with a high-stall converter and low rear gearing.
Can this replace other carburetor brands?
Yes, it's a direct fit for other 4150-pattern carburetors including Holley, Edelbrock, Carter AFB, and Autolite units with the same bolt pattern.
Does this carburetor need an adapter for a spreadbore intake?
Yes, a spreadbore-to-square-bore adapter is required for spreadbore-style intake manifolds.
How much weight does the aluminum construction save?
Approximately 43% less than a comparable zinc carburetor, about 5 lbs lighter.
